Which statement best describes the density of objects that sink when placed in water?

• A. Their density does not affect whether they sink or float.
• B. Their density is less than that of water.
• C. Their density is greater than that of water.
• D. Their density is equal to that of water.

Answer: (C)

Verified step by step guidance

1. Recall the principle of buoyancy, which states that an object will float if its density is less than the density of the fluid it is placed in, and sink if its density is greater.
2. Understand that density is defined as mass per unit volume, given by the formula \(\text{density} = \frac{\text{mass}}{\text{volume}}\).
3. Compare the density of the object to the density of water (approximately 1 g/cm³ or 1000 kg/m³).
4. If the object's density is greater than that of water, it means the object is heavier per unit volume than water, causing it to sink.
5. Therefore, the correct description is that objects that sink have a density greater than that of water.